This study demonstrates that the seropositivity of C.burnetii is moderate throughout Ecuador and is greater infemales and older cattle, as well as in farms where milkreplacers are used for feeding of calves and a high seropos-itivity of BRSV exists. The disinfection of the umbilical cordcould be a useful management measure to reduce the trans-mission of C. burnetii infection in dairy and mixed cattleherds from Ecuador.